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Ryobi RY905500 Spec Review (Discontinued)

The Ryobi RY905500 is a portable open frame generator with a rated wattage of 5500 W and a starting wattage of 6875 W.

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Ryobi RY905500Ryobi RY905500Ryobi RY905500

This product was discontinued. For your convenience, we decided to leave this page up.
It was replaced by the Ryobi RY906500S. However, you might still find it second hand on eBay, by clicking on the button below.

Description

The Ryobi 5,500-Watt Portable Generator with EasyStart technology is where efficiency meets convenience. With a Heavy Duty 420cc OHV engine, this generator delivers 5,500 Running-Watts (6,875 Surge/Starting-Watts) and is powerful enough to be used on a jobsite or as an emergency backup system. Featuring the EasyStart 3-Step starting system and a large 6 Gal. fuel tank, the Ryobi 5,500-Watt Generator can run up to 9 hours at 50% load. The Digital Hour Meter Display allows you to monitor essential functions such as Time of Use, Voltage, Hertz and Total Hours used. The Quick-Release handle provides easy and compact storage while the flat-free wheels and the Hand Truck Frame design allow for easy transport, even over rough terrain. This generator is also equipped with an Automatic Voltage Regulator that provides consistent power. The Control Panel features (4) 120-Volt 20 Amp (GFCI Protected) outlets and (1) 240-Volt Twist Lock 30 Amp outlet to meet all your power needs.

Zoom on the Ryobi RY905500

In a nutshell, the Ryobi RY905500 is a portable generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • Food van owners who know that just a short power outage could lose them hundreds of dollars
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Professionals in need of safely powering high-intensity work or lighting equipment

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.

Power & Run Time

The Ryobi RY905500 in use

The Ryobi RY905500

The Ryobi RY905500 houses a 420 cc Ryobi OHV 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 5500W along with a peak wattage of 6875W.

The generator features Ryobi's EasyStart pull-start mechanism (more information below). It is rated for a noise of 78 dBA (less noisy than a vacuum cleaner).

The RY905500 can operate for around 10 hours at 50% load with a full tank (fuel consumption around 0.6 GPH), due to its fuel capacity of 6 gallons.

The quite high THD (<20%) of the RY905500 makes it unsuitable for powering sensitive electronic devices.

Outlets

The control panel provides the upcoming 5 AC outlets:

Two Duplexes 120V 20A (5-20R) GFCI
120/240V 30A (L14-30R) receptacle

As it features a twist-lock L14-30R receptacle, the RY905500 is transfer switch ready: in case of a power outage, you will be easily able to connect it to a breaker box and power your household.

Portability

The design of the Ryobi RY905500 is a typical, open frame, with the dimensions of L31.5 x W29 x H24 in, offering support and stability and enabling the possibility of raising it above ground level. The featured design is ideal for the outdoors and all tough environments.

While the generator is considered to be technically 'portable' (in the sense that you can move it), manually lifting and transporting it may be challenging, due to its high weight of 192 lbs. However, this lack of maneuverability is compensated by its wheel kit and its folding handle, with which you can conveniently shift it, once it's on the ground.

EasyStart Mechanism

ryobi easystart starting mechanism

Ryobi's 3-step EasyStart mechanism

The unit benefits from Ryobi’s EasyStart mechanism. This 3-step starting system allows you to easily start your generator. It works in the following way:

  1. Put the engine switch on the “ON” position, and place the lever on the “START” position
  2. Pull the recoil until the engine runs
  3. Let the engine run 15 to 30 seconds and place the lever on the “RUN” position

Features

Panel of the Ryobi RY905500

The RY905500's control panel

The RY905500's control center features a convenient meter showing you voltage, frequency and lifetime hours to aid you with the monitoring of its status and activity.

From a security point of view, the generator is equipped with an overload protection (circuit breaker) and an automatic low oil shut-off, giving you a peace of mind during use.

While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the Ryobi RY905500, the following accessories are also included: tool kit and oil.

Emissions

The Ryobi RY905500 is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor, which makes it suitable for use in forested areas.

Product Video

The Ryobi RY905500 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Ryobi RY905500 compare to generators of similar power (between 5000 and 6000 W).

  • At a dry weight of 192 pounds, the Ryobi RY905500 is one of the heavier devices which can produce between 5000 and 6000 running watts. If weight is your top priority, one of the champions in this power category is the WEN GN6000, weighing just 119 pounds.
  • When compared to devices able to produce a similar running wattage, this generator and its lowest emitted noise of 78 dBA is on the noisier side. If you are concerned with noise, check out the Honda EU7000iS, which is one of the least noisy generators in its power range, with a noise rating of just 52 dBA.
  • Regarding its autonomy, the autonomy of the RY905500, reaching around 10 hours at a 50% load, can be considered as low end, compared to other products of a roughly equal output. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Cat RP5500, which is able to run for around 15 hours.
  • Run times are important, yet thanks to their dependence on the fuel capacity, they should be judged along with the fuel consumption of the device. This generator has an average fuel consumption among comparably powerful devices, as it reaches 0.6 GPH (gallon per hour) at a 50% load. If fuel consumption is your top priority, we suggest to check out the Westinghouse WGen5300DFv, which has a fuel consumption of only 0.35 GPH and thus, is one of the most efficient devices in our database.

The bottom line

STRENGTHS:
  • Several accessories included
  • GFCI Outlets
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • No electric start
  • Not CARB-compliant
  • On the heavy side (192 lbs)
  • On the noisy side (78 dBA)
  • Relatively low run time

Do you own the Ryobi RY905500 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine420 cc Ryobi OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120/240V 60 Hz
Running watts5500 W
Starting watts6875 W
Running amps (@120/240V)45.8/22.9 amps
Peak amps (@120/240V)57.3/28.6 amps
Run time @50% load10 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerVFT
IndicatorsNo
Fuel tank6 gal
Fuel gaugeNo
Misc
Weight192 lbs
Approx. dimensions (L x W x H)31.5 x 29 x 24 in
Noise (lower limit)78 dBA
THD< 20%
EmissionsEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, tool kit, and wheel kit
Warranty3 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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About Ryobi

Founded in 1943, Ryobi Limited is a Japanese based manufacturer that throughout its history mainly focused on electrical and automotive components. However, their quite recent power tool branch has proven to be popular for the quality and reliability of its products, which are nowadays found globally on the shelves of most retailers. Ryobi products are listed to be produced in various locations globally, mainly US, Germany, Japan and China.

Warranty Information

The Ryobi RY905500 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Ryobi generators, please consult Ryobi's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-860-4050.

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeSump pump (1/2 hp)10502150
Furnace fan (1/2 hp)8752350
Refrigerator (energy star)1921192
Electric range21002100
Security system180180
Total4397 W5872 W
For campingRadiant heater13001300
RV refrigerator180600
Hair dryer18001900
RV AC (11,000 BTU)10101600
Radio100100
Total4390 W4980 W
For workTable saw18004500
Grinder14002500
Reciprocating saw730960
Bug zapper8080
Total4010 W6710 W
Is there a conversion kit to electric start? (Asked October 15, 2019)

As far as we know, there are no official conversion kits that serve that purpose.

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